Monodisperse Pt nanoparticles anchored on N-doped black TiO2 as high performance bifunctional electrocatalyst

Wang, Xin; Yuan, Xiaotao; Liu, Xiangye; Dong, Wujie; Dong, Chenlong; Lou, Minghe; Li, Juncen; Lin, Tianquan; Huang, Fuqiang

doi:10.1016/j.jallcom.2017.01.152

Cited by 27 publications

(5 citation statements)

References 52 publications

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“…XPS peaks at 70.7 and 74.0 eV are attributed to Pt 0 in comparison to the binding energy of 71.2 and 74.3 eV for bulk metallic Pt, while the peaks located at 72.8 and 76 eV, attributed to Pt 2+ . In agreement with the literature, this negative shift resulted from the electron transfer from TiO2 to Pt [79][80][81][82]. Surface elemental composition and chemical state of Pt/TNTs are listed in Table 3.…”

Section: Xps Analysissupporting

confidence: 89%

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

et al. 2018

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A research and technological challenge for fuel processors integrated with High Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFCs), also known as Internal Reforming Methanol Fuel Cells (IRMFCs), operating at 200–220 °C, is the development of highly efficient catalysts, which will be able to selectively (low CO and other by-products formation) produce the required quantity of hydrogen at these temperatures. In this work, various amounts of platinum were dispersed via deposition-precipitation (DP) and impregnation (I) methods onto the surface of hydrothermally prepared ceria nanorods (CNRs) and titania nanotubes (TNTs). These nanostructured catalysts were evaluated in steam reforming of methanol process targeting the operation level of IRMFCs. The (DP) method resulted in highly (atomically) dispersed platinum-based catalysts, as confirmed with Scanning Transmission Electron Microscopy (STEM) analysis, with a mean particle size of less than 1 nm in the case of 0.35 wt.% Pt/CNRs catalyst. Ultra-fine dispersion of platinum species correlated with the presence of oxygen vacancies, together with the enrichment of CNRs surface with active metallic phase resulted in a highly active catalyst achieving at 220 °C a hydrogen production rate of 5500 cm3 min−1 per g of loaded platinum.

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Section: Xps Analysissupporting

confidence: 89%

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

et al. 2018

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“…electrodeposited Pt on hydrogenated TNTs (H‐TNTs) and used both as anode and cathode at polymer exchange membrane fuel cells (PEMFC). Wang et al [39] . prepared monodisperse Pt nanoparticles on N doped ‐black TiO 2‐ x by a borohydride reduction method and tested them for the HER and oxygen reduction reaction (ORR).…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al. [39] prepared monodisperse Pt nanoparticles on N doped ‐black TiO 2‐ x by a borohydride reduction method and tested them for the HER and oxygen reduction reaction (ORR). Li et al.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Deposition of Pt Nanoparticles on Black TiO₂ Nanotubes for Hydrogen Evolving Cathodes

et al. 2021

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A galvanic deposition method for the in‐situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high‐aspect‐ratio black TiO2‐nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High‐resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm−2 range) achieved low Tafel slopes (30–34 mV dec−1) and high stability in acidic conditions. This study provides important insights for the in‐situ formation and deposition of NPs in high‐aspect‐ratio structures for energy applications.

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“…not only displayed the sufficiently high conductivity of TiO x C y , but also exhibited feasible ethanol adsorption for favorable EOR in the presence of suitable precious metal catalysts. The N‐doped TiO 2 with higher electronic conductivity was also developed ,. However, owing to the suitable energy level for oxygen reduction and hydrogen evolution reactions, most of these supports were usually used for reduction reactions with loading precious metals.…”

Section: Ti Si‐based Supportsmentioning

confidence: 99%

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Huang

Babu

et al. 2018

ChemCatChem

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Polymer electrolyte fuel cells (PEFCs) are among the most advanced energy technologies with low operating temperatures, high energy densities, ease of transportation and storage. However, the deficiencies such as low activity and high cost of the electrocatalysts at anodes greatly hinder their commercialization. The commonly used carbon black supports lack the capacity of regulation over the supported noble metals towards efficient electro‐catalytic oxidation of fuels. In this Mini‐Review, the prerequisite factors in advanced supports are outlined, ranging from self‐supported precious metal alloys as well as non‐noble metal materials, while simultaneously revealing the superiorities of some advanced supports beyond carbon black in terms of electronic conductivity, synergy with surface precious metals, chemical and electrochemical stability, and other possible interactions. The effects arisen from microscopic morphology, nano‐structure, and composition on the electrocatalytic activity/stability are also discussed. Finally, several of the most promising supports are highlighted, and the research trends of synergistic supports in future PEFCs are predicted.

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Monodisperse Pt nanoparticles anchored on N-doped black TiO2 as high performance bifunctional electrocatalyst

Cited by 27 publications

References 52 publications

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

Galvanic Deposition of Pt Nanoparticles on Black TiO₂ Nanotubes for Hydrogen Evolving Cathodes

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

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Monodisperse Pt nanoparticles anchored on N-doped black TiO2 as high performance bifunctional electrocatalyst

Cited by 27 publications

References 52 publications

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

Galvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodes

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

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Product

Resources

About

Galvanic Deposition of Pt Nanoparticles on Black TiO₂ Nanotubes for Hydrogen Evolving Cathodes